/* ============================================
   Chess Academy — Base Styles
   Reset, Typography, Global Defaults
   ============================================ */

/* ── Reset ── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  height: 100%;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(246, 148, 29, 0.06), transparent),
    linear-gradient(180deg, rgba(255, 255, 255, 0.5) 0%, transparent 30%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-text-muted);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-tertiary);
}

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-text-muted) transparent;
}

/* ── Selection ── */
::selection {
  background: var(--color-brand-gold);
  color: var(--color-text-inverse);
}

/* ── Icon system ── */
.icon {
  width: 1.125rem;
  height: 1.125rem;
  flex-shrink: 0;
  display: block;
}

.icon-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-wrap .icon {
  width: 1.25rem;
  height: 1.25rem;
}

.icon-lg .icon,
.icon-lg.icon {
  width: 1.75rem;
  height: 1.75rem;
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-md); }

p {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

a {
  color: var(--color-accent-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-brand-navy);
}

small {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

strong {
  font-weight: var(--font-semibold);
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-bg-elevated);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  color: var(--color-accent-purple-light);
}

/* ── Lists ── */
ul, ol {
  list-style: none;
}

/* ── Images ── */
img, svg {
  display: block;
  max-width: 100%;
}

/* ── Tables ── */
table {
  border-collapse: collapse;
  width: 100%;
}

/* ── Focus ── */
:focus-visible {
  outline: 2px solid var(--color-brand-navy);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ── Utilities ── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.text-gradient {
  color: var(--color-brand-navy);
}

.text-gold {
  color: var(--color-accent-gold);
}

.text-green {
  color: var(--color-accent-green);
}

.text-red {
  color: var(--color-accent-red);
}

.text-muted {
  color: var(--color-text-tertiary);
}

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ── Animations ── */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(24px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-24px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes countUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes bellRing {
  0% { transform: rotate(0); }
  10% { transform: rotate(14deg); }
  20% { transform: rotate(-8deg); }
  30% { transform: rotate(6deg); }
  40% { transform: rotate(-4deg); }
  50% { transform: rotate(2deg); }
  60% { transform: rotate(0); }
  100% { transform: rotate(0); }
}

@keyframes toastSlideIn {
  from { transform: translateX(120%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes toastSlideOut {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(120%); opacity: 0; }
}

.animate-fade-in { animation: fadeIn var(--transition-base) ease-out; }
.animate-fade-in-up { animation: fadeInUp var(--transition-slow) ease-out; }
.animate-slide-in-right { animation: slideInRight var(--transition-slow) ease-out; }
.animate-scale-in { animation: scaleIn var(--transition-base) ease-out; }

@media (prefers-reduced-motion: reduce) {
  .animate-fade-in,
  .animate-fade-in-up,
  .animate-slide-in-right,
  .animate-scale-in {
    animation: none;
  }
}